mthca_uar.c

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    1 /*
    2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
    3  *
    4  * This software is available to you under a choice of one of two
    5  * licenses.  You may choose to be licensed under the terms of the GNU
    6  * General Public License (GPL) Version 2, available from the file
    7  * COPYING in the main directory of this source tree, or the
    8  * OpenIB.org BSD license below:
    9  *
   10  *     Redistribution and use in source and binary forms, with or
   11  *     without modification, are permitted provided that the following
   12  *     conditions are met:
   13  *
   14  *      - Redistributions of source code must retain the above
   15  *        copyright notice, this list of conditions and the following
   16  *        disclaimer.
   17  *
   18  *      - Redistributions in binary form must reproduce the above
   19  *        copyright notice, this list of conditions and the following
   20  *        disclaimer in the documentation and/or other materials
   21  *        provided with the distribution.
   22  *
   23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   30  * SOFTWARE.
   31  */
   32 
   33 #include "mthca_dev.h"
   34 #include "mthca_memfree.h"
   35 
   36 int mthca_uar_alloc(struct mthca_dev *dev, struct mthca_uar *uar)
   37 {
   38         uar->index = mthca_alloc(&dev->uar_table.alloc);
   39         if (uar->index == -1)
   40                 return -ENOMEM;
   41 
   42         uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
   43 
   44         return 0;
   45 }
   46 
   47 void mthca_uar_free(struct mthca_dev *dev, struct mthca_uar *uar)
   48 {
   49         mthca_free(&dev->uar_table.alloc, uar->index);
   50 }
   51 
   52 int mthca_init_uar_table(struct mthca_dev *dev)
   53 {
   54         int ret;
   55 
   56         ret = mthca_alloc_init(&dev->uar_table.alloc,
   57                                dev->limits.num_uars,
   58                                dev->limits.num_uars - 1,
   59                                dev->limits.reserved_uars + 1);
   60         if (ret)
   61                 return ret;
   62 
   63         ret = mthca_init_db_tab(dev);
   64         if (ret)
   65                 mthca_alloc_cleanup(&dev->uar_table.alloc);
   66 
   67         return ret;
   68 }
   69 
   70 void mthca_cleanup_uar_table(struct mthca_dev *dev)
   71 {
   72         mthca_cleanup_db_tab(dev);
   73 
   74         /* XXX check if any UARs are still allocated? */
   75         mthca_alloc_cleanup(&dev->uar_table.alloc);
   76 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/mthca/mthca_uar.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mthca/mthca_uar.c